PatchSiren cyber security CVE debrief

CVE-2023-52879 Siemens CVE debrief

This CVE addresses a vulnerability in the Linux kernel's tracing subsystem where trace_event_file structures lacked proper reference counting. The fix introduces reference counters to prevent use-after-free conditions that could occur when trace event files are accessed concurrently with their removal or modification. The vulnerability was resolved by implementing proper reference counting mechanisms for trace_event_file objects.

Vendor: Siemens
Product: RUGGEDCOM RST2428P (6GK6242-6PA00)
CVSS: Unknown
CISA KEV: Not listed in stored evidence
Original CVE published: 2025-08-12
Original CVE updated: 2026-02-25
Advisory published: 2025-08-12
Advisory updated: 2026-02-25

Who should care

Organizations operating Siemens industrial network infrastructure including SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family, SCALANCE XCM-/XRM-/XCH-/XRH-300 family, and RUGGEDCOM RST2428P switches running SINEC OS should prioritize firmware updates to address this kernel-level vulnerability.

Technical summary

The vulnerability exists in the Linux kernel's tracing infrastructure where trace_event_file structures could be accessed after being freed due to missing reference counting. The resolution implements proper reference counters to ensure safe concurrent access and prevent use-after-free conditions during trace event file operations.

Defensive priority

medium

Recommended defensive actions

Review Siemens ProductCERT SSA-613116 for specific product impact and patch availability
Verify SINEC OS and affected Siemens industrial network device firmware versions
Apply vendor-provided security updates for SCALANCE and RUGGEDCOM product families
Monitor CISA ICS advisories for additional guidance on industrial control system protections

Evidence notes

The source advisory (ICSA-25-226-15) indicates this CVE was included in a Siemens SINEC OS advisory covering multiple Linux kernel vulnerabilities. The threat category is marked as 'Misinformed' in the source data, suggesting potential confusion or misattribution in initial reporting. The advisory was republished on 2026-02-25 based on Siemens ProductCERT SSA-613116. The vulnerability description indicates a kernel-level fix was implemented.

Official resources

2025-08-12